Life of a trophy hunter

So i'm currently playing Uncharted Golden Abyss on the PlayStation Vita and there is a trophy called survivor which you get for killing 75 guys without dying but there is a trick if you're NPC partner dies you have to restart at the check point but it doesn't count as a death. So I was at a part where I have a machine gun with infinite bullets and I have to kill the guys as my "friend" is trying to cross so I would kill a few guys and then let him die and repeat until I got the 75 kills I needed. I know Paeter hates replaying sections of the game over but this was worth it.Also to sweeten the deal there are these things called bounties that are dropped randomly as you kill guys and as soon as I finished getting the survivor trophy I got a trophy saying I completed one complete set of a bounty